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Servicing
Analog Input Calibration
Thermo Fisher Scientific Model 49
i
Primary Standard Instruction Manual 6-15
The Analog Output Cal line displays Zero
Note When calibrating the analog output, always calibrate zero first and
then calibrate full scale.
5. Use until the meter reads the value shown in the Set
Output To line, then press to save the value.
6. Press to return to the previous screen.
7. Press to select Calibrate Full Scale.
8. Use until the meter reads the value shown in the Set
Output To line, then press to save the value.
Analog Input
Calibration
Use the following procedures to calibrate the analog inputs after replacing
the optional I/O expansion board. These procedures include selecting
analog input channels, calibrating them to zero volts, and then calibrating
them to full scale using a known voltage source.
Calibrating the Input
Channels to Zero Volts
Use the following procedure to calibrate the input channels to zero volts.
1. From the Main Menu, press to scroll to Service, press >
to scroll to Analog Input Calibration , and press .
The Analog Input Cal screen displays.
Note If Service is not displayed, refer to “ “Accessing the Service Mode” on
page 6-4 , then return to the beginning of this step.
2. At the Analog Input Cal screen, press to scroll to a channel, and
press .
3. With the cursor at Calibrate Zero, press .
The screen displays the input voltage for the selected channel.